To execute a forward combo, press W to move forward when starting a series of attacks. This is effective when facing a single opponent. To execute a left/right combo, press A or D to move left or right when you start a series of attacks. This is effective against multiple opponents. To execute a chop combo, press S to move back when starting a series of attacks.

Stop coughing

When a Slime shoots out the green gas, go into your inventory and stay there until you stop coughing.